bonuses = [100, 200, 300]

iterator = map(lambda bonus: 2 * bonus, bonuses)

print(list(iterator))

carts = [['SmartPhone', 400],
         ['Tablet', 450],
         ['Laptop', 700]]

TAX = 0.1

carts = map(lambda item: [item[0], item[1], item[1] * TAX], carts)

print(list(carts))
print(type(carts))